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fs: Add support for saving data to filesystems

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Add a new method for saving that filesystems can implement. This mirrors the
existing load method.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2013-04-20 08:42:50 +00:00 committed by Tom Rini
parent 4ca30d6024
commit a8f6ab5229
2 changed files with 76 additions and 0 deletions
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74
fs/fs.c
View File

@ -47,6 +47,12 @@ static inline int fs_read_unsupported(const char *filename, void *buf,
return -1;
}
static inline int fs_write_unsupported(const char *filename, void *buf,
int offset, int len)
{
return -1;
}
static inline void fs_close_unsupported(void)
{
}
@ -57,6 +63,7 @@ struct fstype_info {
disk_partition_t *fs_partition);
int (*ls)(const char *dirname);
int (*read)(const char *filename, void *buf, int offset, int len);
int (*write)(const char *filename, void *buf, int offset, int len);
void (*close)(void);
};
@ -94,6 +101,7 @@ static struct fstype_info fstypes[] = {
.close = fs_close_unsupported,
.ls = fs_ls_unsupported,
.read = fs_read_unsupported,
.write = fs_write_unsupported,
},
};
@ -125,6 +133,7 @@ int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
info->close += gd->reloc_off;
info->ls += gd->reloc_off;
info->read += gd->reloc_off;
info->write += gd->reloc_off;
}
relocated = 1;
}
@ -196,6 +205,30 @@ int fs_read(const char *filename, ulong addr, int offset, int len)
return ret;
}
int fs_write(const char *filename, ulong addr, int offset, int len)
{
struct fstype_info *info = fs_get_info(fs_type);
void *buf;
int ret;
/*
* We don't actually know how many bytes are being read, since len==0
* means read the whole file.
*/
buf = map_sysmem(addr, len);
ret = info->write(filename, buf, offset, len);
unmap_sysmem(buf);
/* If we requested a specific number of bytes, check we got it */
if (ret >= 0 && len && ret != len) {
printf("** Unable to write file %s **\n", filename);
ret = -1;
}
fs_close();
return ret;
}
int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype, int cmdline_base)
{
@ -277,3 +310,44 @@ int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
return 0;
}
int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype, int cmdline_base)
{
unsigned long addr;
const char *filename;
unsigned long bytes;
unsigned long pos;
int len;
unsigned long time;
if (argc < 6 || argc > 7)
return CMD_RET_USAGE;
if (fs_set_blk_dev(argv[1], argv[2], fstype))
return 1;
filename = argv[3];
addr = simple_strtoul(argv[4], NULL, cmdline_base);
bytes = simple_strtoul(argv[5], NULL, cmdline_base);
if (argc >= 7)
pos = simple_strtoul(argv[6], NULL, cmdline_base);
else
pos = 0;
time = get_timer(0);
len = fs_write(filename, addr, pos, bytes);
time = get_timer(time);
if (len <= 0)
return 1;
printf("%d bytes written in %lu ms", len, time);
if (time > 0) {
puts(" (");
print_size(len / time * 1000, "/s");
puts(")");
}
puts("\n");
return 0;
}

2
include/fs.h
View File

@ -62,5 +62,7 @@ int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype, int cmdline_base);
int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype, int cmdline_base);
#endif /* _FS_H */